function hideymail(string1,string3,string4)
	{
	var string2 = "@";
	var outputstring = string1+string2+string3+'.'+string4;
	var email4output = ('<a href="mailto:' +outputstring+'">'+outputstring+'</a>');
	document.write (email4output);
	}
	
function validateForm(theForm)
	{
		if (theForm.sender_name.value == "")
		{
		alert("Please enter your name.");
		theForm.sender_name.focus();
		return false;
		}
		
		if (theForm.friend_name.value == "")
		{
		alert("Please enter your friend's name.");
		theForm.friend_name.focus();
		return false;
		}
	
		if (theForm.sender_email.value.indexOf('@') < 1)
		{
		alert("Please enter a valid email address for yourself");
		theForm.sender_email.focus();
		return false;
		}
		
		if (theForm.sender_email.value == "")
		{
		alert("Please enter your email.");
		theForm.sender_email.focus();
		return false;
		}
		
		if (theForm.friend_email.value.indexOf('@') < 1)
		{
		alert("Please enter a valid email address for your friend");
		theForm.friend_email.focus();
		return false;
		}
		
		if (theForm.friend_email.value == "")
		{
		alert("Please enter your friend's email.");
		theForm.friend_email.focus();
		return false;
		}
		
		var s = theForm.FriendMessage.value
		var i = s.length
		if (i > 300)
		{
		alert("Your message to your friend is too long - please make it less than 300 letters long");
		theForm.FriendMessage.focus();
		return false;
		}
	}